Vacuum

A vacuum as a dream symbol can be defined in two ways. One way of looking at them would be representations of cleaning or removing elements that belong in the unconscious. Houses are symbols of the mind or psyche of the dreamer so it can also be reflected as cleaning clutter of the mind. The same goes as if you where to vacuuming up spiders that also represent removing negative aspects in the dark corners of your mind. In essence, vacuuming in your dream is a positive symbol that metaphorically cleans up some negative aspect of yourself that you may not have been aware of before.